SQL injection vulnerability in search.php for L-Forum 2.40 allows remote attackers to execute arbitrary SQL statements via the search parameter.

Cross-site scripting vulnerability in L-Forum 2.40 and earlier, when the "Enable HTML in messages" option is on, allows remote attackers to insert arbitrary script or HTML via message fields including (1) From, (2) E-Mail, (3) Subject and (4) Body.

Cross-site scripting vulnerability in L-Forum 2.40 and earlier, when the "Enable HTML in messages" option is off, allows remote attackers to insert arbitrary script or HTML via message fields including (1) From, (2) E-Mail, and (3) Subject.

L-Forum 2.40 and earlier does not properly verify whether a file was uploaded or if the associated variables were set by POST (attachment, attachment_name, attachment_size and attachment_type), which allows remote attackers to read arbitrary files.